A commission sharing agreement is a written contract between two or more real estate brokerages that sets out how they will divide the commission earned on a single transaction. It’s the document you rely on when one firm refers a client to another, or when brokers from different offices cooperate on a sale or lease. Without it, you’re trusting a handshake to survive a fight over money, and handshakes rarely do. The rules governing these arrangements tightened after the 2024 National Association of Realtors settlement, and federal law imposes real penalties on firms that structure them incorrectly.
What the Agreement Does and Who Signs It
Commission sharing happens at the brokerage level, not between individual agents. A referring brokerage introduces a client or a deal, the receiving brokerage handles the active work of negotiating, marketing, or closing, and once the transaction closes the receiving firm pays the referring firm an agreed share of the commission it earned. A referral split of around 25 percent of the receiving broker’s gross commission is common, but the parties can negotiate any figure they agree on.
Individual agents almost never have legal authority to collect commission payments directly from outside their own firm. Commissions flow through the sponsoring broker, who then pays the agent’s share under their internal agreement. Every state requires real estate activity to be conducted under the supervision of a licensed broker, and the broker carries legal responsibility for the agent’s conduct. If you’re an agent trying to set up a referral with someone at another firm, the two brokers have to be the ones signing.
Terms the Agreement Must Spell Out
A commission sharing agreement needs enough detail that a stranger reading it could work out exactly who gets paid, how much, and when. Vague terms are the single biggest source of post-closing disputes. At minimum, the agreement should cover:
- Transaction identification: the property address, client name, or deal reference number that ties the agreement to a specific transaction.
- Commission structure: whether the split is a percentage of the gross commission, a percentage of the net after brokerage fees, or a flat dollar amount, and whether any deductions come off the top before the split.
- Triggering event: the exact moment payment becomes owed. For sales that’s typically close of escrow; for commercial leases it might be full execution of the lease or the tenant’s first rent payment.
- Payment timeline: due at closing, within a set number of days after closing, or in installments tied to staggered lease payments.
- Duration: whether the agreement covers a single transaction or extends to future business involving the referred client.
The gross-versus-net distinction matters more than most people realize. Brokerages often deduct transaction coordination fees and insurance costs before distributing funds, and the same percentage applied to those two figures can produce noticeably different checks. Say which figure applies.
Signatures, Delivery, and Records
Commission sharing agreements must be in writing to be enforceable. The statute of frauds, which applies in every state, generally requires contracts related to real estate services and commissions to be documented in a signed writing. An oral promise to split a fee is extremely difficult to enforce in court and is often worthless. Both brokers should sign before any work begins on the transaction, not at closing when one party already has leverage over the other.
Electronic signatures are widely accepted and make it straightforward to finalize agreements across state lines. Once signed, send a copy to the escrow officer or closing agent handling the transaction so they know how to distribute funds, and give a copy to your accounting department so payment records match. Keep the executed agreement in your files for at least three years, which aligns with many state record-retention requirements. IRS rules call for keeping income records at least three years from the date you file the return reporting that income, and up to seven in some circumstances, so erring on the longer side is smart.
Staying Within RESPA
The Real Estate Settlement Procedures Act governs how fees can be shared in residential transactions involving federally related mortgage loans. RESPA Section 8 flatly prohibits kickbacks and unearned fees for settlement services: no one involved in a transaction can pay or accept anything of value merely for referring settlement service business to someone else.
The law carves out a specific exemption for cooperative brokerage and referral arrangements between real estate agents and brokers. Payments under these arrangements are legal as long as they represent compensation for services actually performed or fall within a legitimate referral agreement between licensed professionals.
The line between a legal commission split and an illegal kickback comes down to one question: did the person receiving payment actually do something to earn it? A referring broker who identifies a qualified buyer and connects them with a local agent has provided a real service. A broker who simply passes along a name and expects a cut of every transaction that follows has not. The regulation specifically states that a charge for which “no or nominal services are performed” constitutes an unearned fee.
Criminal penalties for violating Section 8 include fines up to $10,000, imprisonment for up to one year, or both. State licensing boards can impose additional consequences, including suspension or revocation of a broker’s license. Enforcement tends to target patterns of behavior rather than one-off mistakes, but the patterns get noticed.
What Changed After the 2024 NAR Settlement
The settlement of the Sitzer/Burnett antitrust lawsuit changed how commission sharing works in practice. Starting August 17, 2024, new MLS rules prohibited listing brokers from including offers of buyer-broker compensation on the MLS. Before the settlement, a listing might advertise “2.5% to buyer’s agent” right in the MLS data. That mechanism is gone.
Sellers can still offer compensation to a buyer’s broker, but the offer has to happen outside the MLS: through the listing broker’s website, direct broker-to-broker conversations, or other channels. The settlement also requires any MLS participant working with a buyer to enter into a written buyer representation agreement before touring a home, including virtual tours. That agreement must specify:
- The exact amount or rate the buyer’s agent will receive, stated in objective terms such as a flat fee or percentage.
- No open-ended compensation language such as “whatever the seller offers.” The number must be specific and determinable.
- A cap: the agent cannot receive compensation from any source that exceeds the amount agreed to with the buyer.
- A clear statement that broker fees are not set by law and are fully negotiable.
For commission sharing agreements, this means the old model where a listing broker simply advertised a cooperative commission through the MLS no longer applies for MLS participants. A referring broker can’t assume a standard cooperative split will appear on the MLS. Your agreement should explicitly address how the referring broker’s share will be funded now that buyer compensation is negotiated separately.
Licensed Parties Only
Every state prohibits paying any portion of a real estate commission to someone who does not hold an active license. That covers unlicensed assistants, administrative staff, friends who “helped find the deal,” and anyone else without proper credentials. An unlicensed person’s compensation cannot be structured as a percentage of the commission or tied to the success of a transaction. Paying flat hourly wages or salary for administrative work is fine; performance-based compensation crosses into unlicensed activity.
The consequences fall on both sides. The licensed broker who pays a commission share to an unlicensed person faces fines, license suspension, or revocation. The unlicensed person who accepts the payment may face separate civil penalties. More importantly, if a commission sharing agreement names an unlicensed party, the entire agreement may be unenforceable, which means the licensed party could lose their share too. Verify the other broker’s license status before signing. Most state real estate commissions maintain online license lookup tools that take about thirty seconds to check.
When Disputes Arise: Procuring Cause
Even with a signed agreement, disputes arise over which broker actually “caused” the transaction to happen. This is the procuring cause doctrine, and it’s where most commission fights end up. The basic question is whether a broker’s efforts set in motion an unbroken chain of events that led to closing.
Arbitration panels and courts look at who introduced the buyer to the property and whether that introduction was meaningful or incidental, the nature and extent of each broker’s involvement with the buyer or seller, whether there were breaks in the chain of events (such as a buyer walking away for months before re-engaging with a different agent), and whether one broker improperly interfered with an existing brokerage relationship. Panels usually award the entire commission to whichever broker they determine was more responsible. Split awards happen only in unusual cases where the transaction genuinely required the combined efforts of both parties. A well-drafted commission sharing agreement heads off many of these fights by clearly defining each party’s role, the scope of their contribution, and the circumstances under which the agreement terminates.
Tax Reporting on the Payment
When a brokerage pays a commission share to an outside firm, the payment is nonemployee compensation subject to IRS reporting. For payments made in 2026, the paying brokerage must file Form 1099-NEC for total payments of $2,000 or more to a single payee during the calendar year.
Collect a completed W-9 from the receiving firm before making any payment. If the payee fails to provide a valid taxpayer identification number, the payer must withhold at a flat 24 percent backup withholding rate and remit that amount to the IRS.
Commission shares paid to foreign brokerages carry additional obligations. Payments to foreign persons are generally subject to a 30 percent withholding rate on U.S.-source income unless a tax treaty reduces or eliminates it. The paying firm must report these payments on Form 1042-S even if no tax is actually withheld due to a treaty exemption. Both firms should treat the commission share as taxable income in the year it’s received and keep records supporting the payment amount, the transaction it related to, and the agreement authorizing it.